Knowles VC1 from Syferextend the boundaries of cap stable MLCCs
Design engineers looking for capacitors to have a more defined change of capacitance with applied with voltage
can now specify the VC1 range from Knowles Capacitorsbrand, Syfer 
Technology. This residual capacitance range of X7R MLCCs are
designedto not drop more than 50% of their cap value from the 1Vrms
1kHz value, all the way up to full rated DC voltage at room
temperature. In ceramic capacitors, generally speaking, the more
stable the dielectricthe lower the available capacitance value. There
is often a trade-off to be made with the most stable, lowest loss, zero
ageing Class 1 dielectric materials onlyproducing low capacitance
values. However, developments in materials and
processingtechnology, plus an increased understanding of capacitor design and failure modes over time, has led to Syfer making vast improvements in MLC volumetric efficiency.The ceiling of, say, 56nF for a 1kV 1812
case size part 10 years ago has increased to 180nF today. The VC1 range can be operated continuously at full
rated voltage, but if de-rated will maintain a larger percentage of their original capacitance value. For example,
if operated at 80% of the rated voltage the capacitance value will reduce to something near 60%. Defined
capacitance value in case sizes from 0805 to 3640, with voltage rating up to 3kV. Ideal for Powersupplies,
capacitance critical circuits, smoothing circuitsand EMI suppression.
Note: Dielectric Laboratories (DLI), Novacap, Syfer Technology and 
Voltronics have come together into a singleorganisation, Knowles
Capacitors. This new entity has a combined history exceeding 175
years and is a division of Knowles Corporation of USA, an
independent publicly traded company.